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	<h3>EL 是取不到URL参数的</h3>
	<p>key : ${key}</p>
	<p>value : ${value}</p>
	
	<h3>使用request获取URL参数</h3>
	<%
		String key = (String)request.getParameter("key");
		String value = (String)request.getParameter("value");
		out.println("<p>key: " + key);
		out.println("<p>value:" + value);
	%>
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